When a light ray travels between any two points, the path it ...

[TVarnum]

When a light ray travels between any two points, the path it takes is the one that (Hint: Eliminate answers you know are wrong.)
   
  a.
  covers the greatest distance.
   
  b.
  follows the greatest index of refraction.
   
  c.
  avoids travel in more than one medium.
   
  d.
  is the mean between the longest and the shortest paths.
   
  e.
  takes the least time.

Question 2

A light ray strikes a hexagonal ice crystal floating in the air at a 30 angle to one face, as shown below. The hexagonal faces of the crystal are perpendicular to the plane of the page. All the rays shown are in the plane of the page, and n_ice = 1.30. Which outgoing ray is the correct one?
 
   

   
  a.
  A
   
  b.
  B
   
  c.
  C
   
  d.
  D
   
  e.
  E

[tdewitt]

Answer to Question 1

e

Answer to Question 2

b